Busted a lug nut stud clean off.
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Lead Driver
Joined: Jun 2005
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From: Calgary Canada
Busted a lug nut stud clean off.
So I was changing the tires on my moms Toyota. The rims I'm putting on are aluminum, so the nuts have that washer on them that just turns and won't mark the rim. Did all the lug nuts finger tight and then brought out the "click" type tourque wrench. It was set at 105 ft-lbs. I didn't hear a click until the stud broke clean off. Did the rest of the nuts varey carefully and hear the click most times. It doesn't "seem" like the wrench is broken. It worked normally after that.
Question:
Would the light coating of grease that appeared to be on the studs cause the nut to slip enough to cause this?
Lesson learned. 105 ft-lbs is probably too tight for aluminum rims on a corolla, and I'll be sure to clean and dry the studs next time.
Thoughts or similar experiences?
Question:
Would the light coating of grease that appeared to be on the studs cause the nut to slip enough to cause this?
Lesson learned. 105 ft-lbs is probably too tight for aluminum rims on a corolla, and I'll be sure to clean and dry the studs next time.
Thoughts or similar experiences?
Post Fiend
Joined: Mar 2002
Posts: 19,402
Likes: 38
From: Bonita Springs FL
I would say that 105 lb-ft is way too much for a corolla with aluminum rims. 75 is about right.
I broke one off the rear of my truck once - had to twist the tire iron pretty hard to break it, but it needed to go.
I broke one off the rear of my truck once - had to twist the tire iron pretty hard to break it, but it needed to go.
Postmaster
Joined: Mar 2001
Posts: 4,968
Likes: 3
From: So Cal
Yeah 105 is a bit high for a ricer. Most cars I have torqued were something between 80 amd 100foot pounds at most. The trucks go higher but not a heck of a lot.
Oh and just because the numbers on the wrench say XX foot pounds doesn't mean it is accurate. SOme of the chinese stuff has been known to be somewhat off. To be sure you can send it out calibration but that often costs as much as the cheap wrenches. You might also oil it, that's what that little plug and hole is for. Or pray or some people swear by the old fashioned "bar" type torque wrench. They just have a steel bar and pointer that tell you torque. Usually they are accurate and don't get out of adjustment or oiling. Not as convenient but maybe more trustworthy.
Good Luck,
Jim Henderson
Oh and just because the numbers on the wrench say XX foot pounds doesn't mean it is accurate. SOme of the chinese stuff has been known to be somewhat off. To be sure you can send it out calibration but that often costs as much as the cheap wrenches. You might also oil it, that's what that little plug and hole is for. Or pray or some people swear by the old fashioned "bar" type torque wrench. They just have a steel bar and pointer that tell you torque. Usually they are accurate and don't get out of adjustment or oiling. Not as convenient but maybe more trustworthy.
Good Luck,
Jim Henderson
Last edited by jim henderson; May 8, 2007 at 05:28 PM.
Post Fiend
Joined: Jun 2002
Posts: 13,873
Likes: 3
From: Atlanta GA
> It was set at 105 ft-lbs
Most of the alloy Japanese rims are 80 pounds (max sometimes). A Chevy V-8 with a 7/16 lug and steel rims is 90 pounds. 100 pounds for a Ford with a 1/2 x 20 steel. I think you are probably 20-30 pounds over, before you added the lube.
FWIW: Any car that has alloy rims, four lugs, and lays rubber with the front wheels probably isn't a manly high torque candidate.
Most of the alloy Japanese rims are 80 pounds (max sometimes). A Chevy V-8 with a 7/16 lug and steel rims is 90 pounds. 100 pounds for a Ford with a 1/2 x 20 steel. I think you are probably 20-30 pounds over, before you added the lube.
FWIW: Any car that has alloy rims, four lugs, and lays rubber with the front wheels probably isn't a manly high torque candidate.
Post Fiend
Joined: Mar 2002
Posts: 19,402
Likes: 38
From: Bonita Springs FL
Originally Posted by rebocardo
and lays rubber with the front wheels
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Lead Driver
Joined: Jun 2005
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From: Calgary Canada
Well, this car is somewhat peppy, but it certainly can't lay rubber. Also, it's got five lug wheels.
Still, I see your point. Maybe the real surprise here is that none of the other studs broke off through the three or four times I've swapped tires and overtightened them.
Still, I see your point. Maybe the real surprise here is that none of the other studs broke off through the three or four times I've swapped tires and overtightened them.
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